Phytopathology (2017) 107, 240-251

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Maher Al Rwahnih, Olufemi J. Alabi, Nathaniel M. Westrick, Deborah Golino and Adib Rowhani (2017)
Description of a novel monopartite geminivirus and its defective subviral genome in grapevine
Phytopathology 107 (2), 240-251
Abstract: A novel virus was detected in grapevines by Illumina sequencing during the screening of two table grape (Vitis vinifera) accessions, cultivars Black Beet and Nagano Purple, from South Korea. The monopartite circular ssDNA genome sequence was subsequently confirmed by rolling cycle amplification, cloning and Sanger sequencing. The complete viral genomic sequence from both accessions ranged from 2,903 to 2,907 nucleotides in length and contained the conserved nonanucleotide sequence TAATATT-AC and other sequence features typical of the family Geminiviridae, including two predicted sense and four complementary-sense open reading frames. Phylogenetic analysis placed the novel virus in a unique taxon within the family Geminiviridae. A naturally occurring defective subviral DNA was also discovered. This defective DNA molecule carried a deletion of approximately 46% of the full-length genome. Both the genomic and defective DNA molecules were graft-transmissible although no disease is yet correlated with their occurrence in Vitis spp. The tentative names Grapevine geminivirus A (GGVA) and GGVA defective DNA (GGVA D-DNA) are proposed. PCR assays developed using primers designed in the coat protein gene led to the detection of GGVA in 1.74% of 1,262 vines derived from 15 grapevine cultivars from six countries across three continents.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Olufemi J. Alabi, Deborah A. Golino, Adib Rowhani

Research topic(s) for pests/diseases/weeds:
identification/taxonomy


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Grapevine geminivirus A Grapevine (Vitis) Korea-South